<template>
  <div id="aCoursesList" class="bg-fa of">
    <!-- 讲师列表 开始 -->
    <section class="container">
      <header class="comm-title all-teacher-title">
        <h2 class="fl tac">
          <span class="c-333">全部讲师</span>
        </h2>
        <section class="c-tab-title">
          <a id="subjectAll" title="全部" href="#">全部</a>
        </section>
      </header>
      <section class="c-sort-box unBr">
        <div>
          <!-- /无数据提示 开始-->
          <section class="no-data-wrap" v-if="data.totalCount === 0">
            <em class="icon30 no-data-ico">&nbsp;</em>
            <span class="c-666 fsize14 ml10 vam"
              >没有相关数据，小编正在努力整理中...</span
            >
          </section>
          <!-- /无数据提示 结束-->
          <article class="i-teacher-list" v-else>
            <ul class="of">
              <li v-for="teacher in data.items" :key="teacher.id">
                <section class="i-teach-wrap">
                  <div class="i-teach-pic">
                    <a :href="'/teacher/'+teacher.id" :title="teacher.name" target="_blank">
                      <img :src="teacher.avatar" :alt="teacher.name" />
                    </a>
                  </div>
                  <div class="mt10 hLh30 txtOf tac">
                    <a
                    :href="'/teacher/'+teacher.id"
                      :title="teacher.name"
                      target="_blank"
                      class="fsize18 c-666"
                      >{{ teacher.name }}</a
                    >
                  </div>
                  <div class="hLh30 txtOf tac">
                    <span class="fsize14 c-999">{{ teacher.career }}</span>
                  </div>
                  <div class="mt15 i-q-txt">
                    <p class="c-999 f-fA">{{ teacher.intro }}</p>
                  </div>
                </section>
              </li>
            </ul>
            <div class="clear"></div>
          </article>
        </div>
        <!-- 公共分页 开始 -->
        <!-- 前端方式 -->
        <div>
          <div class="paging">
             <!-- undisable这个class是否存在，取决于数据属性hasPrevious -->
            <a
              href="javascript:void(0);"
              :class="{ undisable: !data.hasPrevPages }"
              title="首页"
              @click="gotoPage(1)"
              >首页</a
            >
            <a
              href="javascript:;"
              :class="{ undisable: !data.hasPrevPages }"
              title="前一页"
              @click="gotoPage(data.pageIndex - 1)"
              >&lt;</a
            >
            <a
              href="javascript:;"
              :title="`第${page}页`"
              v-for="page in data.totalPages"
              :key="page.id"
              :class="{
                current: data.pageIndex === page,
                undisable: data.pageIndex === page,
              }"
              @click="gotoPage(page)"
              >{{ page }}</a
            >
            <a
              href="javascript:;"
              title="后一页"
              :class="{ undisable: !data.hasNextPages }"
              @click="gotoPage(data.pageIndex + 1)"
              >&gt;</a
            >
            <a
              href="javascript:;"
              title="末页"
              :class="{ undisable: !data.hasNextPages }"
              @click="gotoPage(data.totalPages)"
              >尾页</a
            >
            <div class="clear"></div>
          </div>
        </div>
        <!-- ElementUI分页器 -->
        <!-- <el-pagination
          style="text-align: center; margin-top: 20px"
          background
          @current-change="gotoPage"
          :current-page="data.pageIndex"
          :page-size="8"
          layout="total, prev, pager, next"
          :total="data.totalCount"
        >
        </el-pagination> -->
        <!-- 公共分页 结束 -->
      </section>
    </section>
    <!-- /讲师列表 结束 -->
  </div>
</template>
  <script>
import teacherApi from "/api/teacher";
export default {
  //   异步去加载数据，会把渲染出的html一并返回给浏览器端
  asyncData({ params, error }) {
    return teacherApi.getPagedList(1, 8).then((res) => {
      return { data: res.data };
    });
  },
  methods: {
    //   页码跳转
    gotoPage(page) {
      // 给页码进行判断
      if (page <= 0) {
        // 如果页码为0时，page=1或直接return停止请求
        // page=1
        return;
      }
      if (page >= this.data.totalPages) {
        // page = this.data.totalPages;
        return
      }
      teacherApi.getPagedList(page, 8).then((res) => {
        this.data = res.data;
      });
    },
  },
};
</script>